Fluid-actuated valve.



No. 655,737. Mmm Aug. s4, mun.

J. mums.

FLUID ACTUATED VALVE.

(Application med Nov. 17, 1899.) (No Model.) 3 Sheets-*Sheet l,

No. 555,737 Patented Aug. i4, i900. J. B. RHDDES.

FLUID ACTUATED VALVE.

(Application led Nov. 17, 1899.)

3 Sheets-Sheet 2l (No Model.)

-1| lH u w; ...w 1 .i .n

Vyl r EE E E E.

Patented Aug. I4, |900.

J. B. BHDES.

FLUID ACTUTED VAMVE.f

(Application filed Nov4 17, 1899.)

3 Sheets-Sheet 3.

(No Model.)

. Vlauw EEEEE dramas JAY li. RHODES,

intr" AUSTIN, OF CHICAGO, lLlilNOlS. n

stemmers/irse vente.

SJEEMJIEIEUATIN forming part of Letters Patent No. (555,737, datedAugust ld, 1900.

l Application led November 17, 1899. Serial No. 737,338. (No modell) Toall wiz/ont t may concern: y

lie it known that l, JAY l. RHODES, a resident of Harvey, county otCook, State of Illinois, have. invented a certain new and uscfnl`Improvement 'in Motivewliluid-Actuated Valves for Engines, of which thefollowing is a speciiication. y

My invention relates to motivo-iluid-actuated engines in general, butmore particularly to Stcam-pnmps, and especially to steam` pumpsprovided with steam-actuated reversing-valves. I

The objects oi' my invention are to provide a simple andhighly-ellicicnt constructionv of steam-pump, to provide a constructiontending to reduce the cost oi manufacture, to improve the working of theval-ve, to facilitato the admission and exhaust., and to provide certaindetails and features of improvement 'tendingwto render a device of thischaracter serviceable and thoroughly reliable.

To the attainment of the foregoing and other useful. ends my inventionconsists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a side elevation of asteam-pump embodying the prineiplesof my invention, the cylinder andvalve-casing or steam-chest being shown in vertical section. Fig. is acrossseetion on line t o; in Fig. l.

valve-casing on line y y in Fig. Fig. i is an enlarged view of thesteam-actuated re vcrsingvalve, the saine being shown in longitndinalsection. Fig. 5 is a cross-section of the valve on line e in Fig. e.Fig. (i is a view similar to Fig. l, but showing the piston at the limitof its stroke Vto the left and the valve. at the right, and in this Viewthe valve is shown in longitudinal section.

In Figs. l and (l it will be understood that the right-hand portion ofthe pump, which is simply shownin outline, may be of. any known orapproved construction and may comprise any suitable arrangement ofvalves, plunger7 duc., requisite to a pump of this character. Theleft-hand portion of the pump, which is shown in vertical section,comprises the cylinder A and the steam-chest or valve-casing B. The saidcylinder incloses a spool-shaped or donble-headed piston C. Thesteam-chest Fig. 3 isa horizontal4 section through the central portionof the contains a spool-shaped reversing-valve D. Between the two headsoi' the piston there is, it will be'observed, suiiicient space to afforda chamber, and into this chamber steam is admitted at full-boilerpressure, as will hereinafter more fully appear. The rcciprocation ofthe piston is effected in the usual mannerthat is to say, by alternateadmissions of steam to the opposite ends of the cylinderiei.4 Suchadmission of steam to the cylinder, as well as the exhaust therefrom, iscontrolled by the steam-actuated reversing-valve D. The piston isreciproca-ted by steam admitted from the valve, and the valve isactuated by steam admitted from the space between the two heads of thepiston.V in. this way each serves as a valve for reversing the other.The system of ports and passages by which such action is obtainedconsists as follows: The valve-casing B is constructed. with a couple ofend chambers Z1 and b, and leading from these two chambers to the endsof the cylinder are the two passages l .and 2. These passages servealternately as'supply andexhaust passages, and for such purpose eachleads from the inner end of a valve-chamber to and opens into one end ofthe piston-chamber d. .Further communication between the cylinder andsteam-chest is afforded by a couple of passages 3 and e, it beingobserved that the former leads from the outer end of chamber h to andopens into the cylinder at a point somewhat insideof the port or passagel and that the latter leads from the outer end of chamber b' to andopens into the cylinder at a point a similar distance inside of port Thecylindric middle portion d of 'the valve D is arranged to fit and slidein the cylindric opening or bore b2, which connects the two chambers .band b and which is of course oi smaller diameter than the latter. (SeeFig. 3.) This middle chamber bzis pro vided with three circumferentialgrooves 5, 6,' and 7, which encircle the valve. Grooves 5 and 7 serve asexhaust-passages and for such purpose are connected and arranged to openintothe common enhaust-passage 8. (See Figs. 2 and 8.) Groove 6, whichoccupies a middle position, is,'however, a live-steam passage and isconnected with the steam-pipe 9 through the medium ofa passage-l0. A

-dgisks d and d2.

team to enter the constant-pressu re chamberin the pistonJ/,f Theby-pass openings or passagesJQ and .113, which respectively' connectcham erh with Ipassage llandchamber b" with passage 2, co plete thesystem of portage in theQengine-ca ing. J'

' The/ steamy'.- actuatedh'reversing valve D,

which ccperates with the pprts in admitting v'ffxhausging# steam/to adfrom the cylinspool-shaped or lijnd icmiddle portion d and the tvvoheads or Preferably the-'cylind ic portion d is made hollow and lV'provided'V ith a central )ivall or diaphragm d4,

" iA to nh 'diaphragm d4, are-designed to reg'gister alter- ,nptelyvvithl"'groves 5-and 6 andi-6 and 7 for y ,purposeof' admittingr steaml." alternately portatil' and d1? aref. in constanteommunica-.

tion wi-ith-fthe chambers h and b', and the port-s d dfwhficlnit will beobserved, open valve at either side of the Wallior lef/opposite fndsofthe 'cyl'fnfden These ports intheffvagve also serve vs 'exhaust-pas-'sagem/as Will Iire/fully appear from the fol- 'lewin-g whichisltaydescription lof the operation between the chamberI b and theconstant- In the val e being at ,the left, steam is entering tllit'aivhand ,end of the cylin; der by vif/ay of .peri ,lOl` groove 6,ports dgjin the'vafve, chamber d6 irl' the valve, ports dw;

in the valve, ycharhls'gr1)., andthe duct or passage 2. Ine-,thisiiglireg'ftherefore, the/piston is travelinlfo the left and Jtheexhaustlfrom, the left-han end of the cylinder is escaping by way'ofi'passage 1, chamber b, ports d7 in 'the val.vee'l1amber d5 in thevalve, ports als 'i'ir the valve, groove 5, and the ltimateexhaust-passage 8. vThe h'ead c of! the piston 'isi it will be observed,about to' uncover the nd to thereby e'stablix h communicaress urechamber in the piston. The live team th'us admitted to the left of thevalve 'will'shift the latter to the right, and the ad-Inisipland'exhaust of steaml Wi ll then be as Iiollovvs; InjFig. 6thepif'ston is shown Ilat the ,limit of its/'stroke' to the left, andthevalve,

tareas on o'f the aforesaid admission of steam ptits'left, is atj theright. With these relagive positions of the valve and piston livesteamis entering altr-theI left of the piston by wa' i. of passage 10.groove 6, ports d8 in the va ve, chamber in the valve, ports 17in thevalve, chamben'b, and the duct or passag l., Also intliis ligure theexhaust'from the i'ghtof the ypiston is escaping by Way of The'. headsor disks d and* f Z2 are held upon the ends of the cylindric i portioncl by means'fof nuts d3.

'passage 2, chamber b', ports d10 in the valve,

chamber d6 in the valve, ported9 in the valve, grbove 7, and the nalexhaust-passage 8. I t will also be seen that an exhaust has taken placefrom the right of the valve by way of passage 4, the right-hand end ofthe cylinder, passage 2, chamber b', ports d10, chamber d6, ported",groove 7, and the exhaust-passage 8, and the exhaust from the left ofthe valve when the latter shifts in such direction is of coursepermitted to escape in a similar manner by way of 4passage 3. In thissaidf'Fig. G thepiston is therefore just starting on its stroke to theright. The movement of the piston to the right will cause' the head ordisk c to cover the port 3, thereby cutting off the admission of steamfrom the constant-pressure chamber to the left of the valve, and at suchtime the valve would but for the bypass 12 flyfback to the positionshown in Fig. 1 as a result of thepreponderance of pressure on the innersurface of the disk d. This by-pass 12, however, permits live steam toenter at the left of the Valve from the passage 1, and in this way thevalve is maintained in the proper position until the piston hasreacheddthe v'limit of its stroke to the right. The by-pass 13 serves ina similar manner to maintain the valve at the left While disk c' ispassing port 4 and until the piston has reached the limit of its stroketo the left.

It will also beseen at this juncture that, for4 instance, Jthe valvewhen shifting to the right will pass or uncover by-pass 12 before bring-6 and that consequently the reversal of the piston is in this caseaccomplished, primarily, by an admission of steam from theconstantpressure chamber by Way of port 3, chamber In this lway thepiston is eifectively cushioned at the end of its'stroke to theleft, andby reason of b3, by-pass 12, and the passage 1.

the ports 2, 4, and 13a similar result is of course obtained at the endof its stroke to the right. A

Thus it will bev seen that while I employ liveI steam for actuating thevalve the construction of the latter is simple and, together with thearrangement of ports, dac., of a character to render the manufacture ofthe pump comparatively inexpensive. The two chambers in the valve servealternately as supply and exhaust/passages, and the longbearingsurface'r afforded by the bore or opening h2 permits the valve toreciprocate smoothly and with but little weas In this Waylealage isavoided,v and,furthermore,the eonstructionis,

it'will be seen, such as to render the pump easy of repair. i l

Whatl claim as my invention is ICO 'ing the ports ds into-register withthe groove '1. The combination of a cylinder, valvecasing, piston andsteam-actuated reversingvalve, the said cylinder and valve-casing havingsuitable ports or passages for admitting and.' exhausting steam to andfrom the piston'- chamber, and, the Valve being provided with anylindricportion having ports which serve alternately as supply andexhaustpassages llO for the cylinder.

2. The combination of a cylinder, valvecasing, piston and steam-actuatedvalve, the cylinder and valve-casing having suitable ports or passagesfor admitting and exhaustpiston-chamber,

ing steam to and from the and the said valve being ported and having acouple of chambers which serve alternately as supply and exhaustpassages -for the cylinder. y

12.- The combination of a cylinder, valvecasing, piston andsteam-actuated reversingvalve, the cylinder and casing having suitableports or passages for `admitting and exhausting steam to and from thepiston-cham.

ber, and the said valve having a reduced cylindric middle portion whichslides in a borel oropening in the casing, and which is provided withports serving alternately as supply and exhaust passages.

4.*The combination of a piston provided with a constantpressure chamber,a cylinder j and valve-casing having suitable ports or pas- 2 5 sages,and a valve which is actuated by steam from said constantpressurechamber and which is provided with a cylindric middle portion havingports which serve alternately as supply and exhaust ports. i

5. The combination of the spool-shaped piston and the spool-shapedvalve, the cylindric middle portion of the latter being hollow andprovided with ports whereby both. the live steam andv the exhaustfareconducted through the interior of said valve.

6. The combination of a cylinder, valvecasing, piston and steam-actuatedreversin valve, the valve-casing having a central bore or openingprovided with three grooves or channels which encircle the cylindricmiddle portion of said valve, and the said cylindric portion of thevalve being provided with ports which coperate with said grooves orpassages and which serve alternately as snpply and exhaust passages. Y

7. The combination of a recessed or chambered piston, a spool-shapedsteam-actuated reversing-Valve, anda cylinder and valve-casing havingthe ports or passages l, 2, 3,' 4 and ll, and the by-pass openings 12and 13; the valve being provided with ports which serve alternately assupply and exhaust ports, substantially as shown and described.

8. The combination of a cylinder, valvecasing, piston and steam-actuatedreversingvalve, the cylinder and casing being provided with suitableports or passages, and the valve being provided With ports which servealternately as supply and exhaust passages for the cylinc er and .vhichalso serve as exhaust-passages for the exhaust from the valve.

9. In combination with a suitable cylinder, piston and l valve-casing,steam-actuated reversing-valve D, having the chambers d5 and d and thelateral ports di, d8, df and d1, substantially as and for the purposeset forth.

10. AIn a steam or other motive-fluid actu'- ated engine, thecombination of a cylinder and piston, the said piston being recessed orchambered to provide a'constant-pressure chamber, and thev said cylinderbeing provided With suitable ports or passages for admitting andexhausting steam to and from the ends oi' said cylinder, and also with apassage for supplying live steam to the said constant-pressure chamberin the piston; a

the spoolshaped steam-actuated reversing-valve which is subpistonarranged for reciprocation within said cylinder, the spool-shapedsteam-actuated reversing-valve arranged for reciprocation Within saidsteam-chest, both the cylinder and steam-chest being provided withsuitable portsor passages for admitting and exhausting steam to and fromthe said cylinder and steam-chest, and a passage being also providedforsnpplying live steam to the cylinder at a point between the heads ofthe pistong'and the said spoolshaped reversingvalve, which is actuatedby steam admitted from the constant-pressure chamberin the piston,having a `hollov and cylindric middle portion which is ported to permitlive steam 'to pass through the valve to the cylinder, and

which is also' ported to permit the exhaust ,les

from the cylinder to escape through @the said valve, substantially asshown anddeseribcd.

JAY n. encens'. Witnesses:

.An F. DURAND, A. A. DnvINn.

